Machine for covering lithographic-printing rollers.



PATBNTED JULY 21, 1903. o. WAGNER. MACHINE FOR COVERING LITHOGRAPHIC PRINTING ROLLERS.

APPLICATION FILED JULY 28, 1902.

2 SHEETS-SHEET 1.

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No. 734,381. v PATENTED-JU'LY'ZI, 1-9 03. a; WAGNER.

MACHINE FOR COVERING LITHOGRAPHIO PRINTINGROLLERS.

APPLICATION FILED JULY 28, 1902 2 SHEETSSHEET 2.

N0 MODEL.

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IIVVENTOR WITNESSES: W

" UNiTED .PATENT I Ezattentm July 21, 90

, OFFICE.

oHARLEs WAGNER, OF NEW YORK, N. Y.'

srizcrsrch rroivrormm part of Letters Patent No. 734,381,6lated July 21,1903,

Applicationfiled July 28, d

To all whom it concern:

Be it known that 1, CHARLES WAGNER, a. citizen of the United States, and a resident-of the city of New York, borough of Manhattan, in the county and;State 'oanew York, have. invented a new and Improved Machinerfor Covering Lithographic-Printing Rollers, 'of which the following is a full, clear, andexact description,

The invention relates to the manufacture of printing rollers for lithographic-printing machines; and its object is toprovide a new and improved machine for drawing the leather, skin, or cover over' the filling in a very simple, quick, and effective manner'withoutrequiring skilled labor.

The invention consists of novel features and parts and combinations of thesame, asawillr be more fully described hereinafter and then pointed out in the claims. A practical embodiment of, the invention is. represented in the-accompanying" drawings, forming a part of this specification, in which similar characters of reference. indicate 'corresponding partsdin' all. the views."

Figure 1 is a side elevation of theimprove= ment. Fig. 2 is' a front ,view'of the same. Fig. 3 is a plan view of the upper endofithe machine. Fig.4 i'sa sectional=plan viewof the improvementpn the lineikt -1 of Fig.2, and Fig. 5 is-a transversesection of the same on the line 5.5.of' Fig. 2.v '2 L The improved-.iinachine is. mounted on. a base A, carryingiaznumber'of; spaced columns B, connected with'each' oithe'r atrtheir vupper. ends by across-plate B.,and on the saidbase A is securedan.upwardly extendingso'cket' O, in which. is fastened-the low'er end'ofa'stock D, carryingtheu'sua'l filling D, over 'which leather, skin; or a hoverlD is to -.b'e.drawn'tocomplete the .lithographic-printing roller, .as hereinafter more'fully'described'.

A set-screw 1C. serves to'fasten'the'stockD in the socket G. The upper end of-"the skin or cover 'D iseng'aged' bya hook E, held on one end of a rope E extending upwardly over an overhead pulley E journaled in suitable beari-ngs on a rod Eiheld vertically slidable in the cross-plate B and adapted to be secured therein by a set-screw E (See 1 engaged by apaw1 J,fulcrumedon a footlever J hung loosely on the shaft I and normally Fig. 3.) The downwardly-extending end of 19 02. s i-aliia miz. (Noniodcld bearings A, secured on thebase A. '7 On one end of the shaft'Iis secured a ratchet-wheel J,

held in an uppermost position by a spring J a'stop-pin J Iimiting the upward movement of the said foot-lever or treadle, as illustrated fin Figs. 1 and 2. The'stop-pin J is held vertically adjustable on one of the columns B.

NoW by the operator pressing the foot-le- 'ver J 'the 'pawl J imparts a rotary motion to the ratchet-Wheel J, so that the latter turns the shaft I and drumsH to wind up the cables G, and thereby cause the clamps F to.

pull on the skin D in a downward direction to draw the skin over the filling D. When the operator releases the pressure on thefootQ-lever 01*.treadle' J then the spring J 3 returns the. foot-lever to an uppermost position and the pawl J glides during this upward move-, ment ofxthelever back over the teeth of the ratchetwheelJ, and thelatter is held against returnmovement by a dog .Iflfulcrumed on thebase-A.

In order toins'ule aprope-r winding and unwinding ofthe cables G onthe drums H, I

engage each of the cables directly opposite the corresponding drum with a grooved pulley K,' mounted to rotate and to slide longition' of the socket O, and the upper end of .the sa'id arm L is engaged by an adjustingscrew L screwing in the socket C. By turnin'g the screw L the arm L may be swung inward or outward, so as .to move the rod K transversely to bring the grooved pulleys K in proper relation to the cables G and the drums H, so that when the cables'wind up on the drums the pulleys K cause the cables G to follow the spiral grooves of th'e pulleys K, and consequently the con'volutions "of." the cables do not double up, but range one alongside the other to insure a uniform winding up of the cables G to exert an equal downward pull by the clamps F on the skin D to draw the same in perfect order over the filling D. As the skin D fits very closely onto the filling D, it is absolutely necessary that an equal pull be exerted on both sides of the lower end of the skin D to insure the proper formation of a lithographic-printing roller, and this is accomplished by the arrangement above described.

In using the machine the stock D, with the filling D thereon, is inserted into the socket O and fastened therein by the set-screw O, and the upper end of the skin D is engaged by the hook E, and the skin is drawn upward by the counterweight E on the rope E until the lower end of the said skin is above the top of the stock D. The operator next swings the dog J and pawl J out of mesh with the ratchet-Wheel J and then pulls on the cables G, so as to unwind the same on the drums H to permit of connecting the clamps or jaws F with the lower end of the skin D at opposite sides thereof. The skin D extends in axial alinement with the stock D and its filling D, and when the pawl J and the dog J are thrown in mesh with the ratchet-wheel J and the foot-lever or treadle J is alternately pressed and released then an intermittent winding up of the cables G on the drums H takes place to cause the clamps F to draw the skin D downward over the filling D, as before explained. When the skin is in position on the filling D, then the clamps F are disconnected and the hook E is unhooked, afteuwhich the printing-roller is removed from the socket C.

The cross-plate B is preferably provided at its front with a movable section B hinged at B to the plate and adapted to be locked in position on the plate by a screw B on the free end of the section B. By this arrangement the section B may be swung outward to give convenient access to the central opening in the plate B for the insertion-of the stock D in the socket O in case very long printing-rollers are covered with correspondingly long skins in the manner described.

On the columns B are adj ustably held steps B B for the operator to step on when attaching the hooks E to very long skins D Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A machine for placing skin on the filling of a printing-roller, consisting of a movable suspension device for supporting the skin above the roller, a device for engaging the end of the skin, and means for drawing the same in the direction of the length of the roller and over the filling thereof, as set forth.

2. A machine for drawing skin in position on lithographic-printing rollers, consisting of a counterbalanced suspension device for engaging the upper end of the skin, and a drawing device for engaging the lower end of the skin, to draw the latter lengthwise over the filling of the roller, as set forth.

3. A machine for placing skin on a printingroller, consisting of a drawing device having clamps for directly engaging oppositesides of the skin at one end, and means for moving the clamps lengthwise of the roller, to draw the skin over the filling of the roller, as set forth.

4:. A machine for placing skin on a printingroller, consisting of adrawing device having clamps for directly engaging opposite sides of the skin at one end thereof, and a manuallycontrolled means for intermittently moving the clamps lengthwise of the roller, to draw the skin over the filling of the roller, as set forth.

5. A machine for placing skin on aprintingroller, comprising clamps for directly engagingopposite sides of the skin at one end thereof, cables each carrying a clamp, grooved drums on which wind the said cables, and means for rotating the said drums, as set forth.

6. A machine for placing skin on aprintingroller, comprising clamps for engaging opposite sides of the skin at one end thereof, cables carrying the said clamps, grooved drums on which wind the said cables, means for rotating the said drums, and grooved guidepulleys engaging the said cables opposite the drums, the guide-pulleys being mounted to turn and to slide in the direction of the length of the drums, as set forth.

7. A machine for placing skin on a printingroller, comprising clamps for engaging opposite sides of the skin at one end thereof, cables carrying the said clamps, grooved drums on which wind the said cables, means for rotating the said drums, grooved guide-pulleys engaging the said cables opposite the drums, the guide-pulleys being mounted to turn and to slide in the direction of the length of the drums, a carrier for the said guide-pulleys to slide and rotate on, and means for adjusting the said carrier, as set forth.

8. A machine for placing skin on aprintingroller, comprising clamps for engaging opposite sides of the skin at one end thereof, cables carrying the said clamps, grooved drums on which wind the said cables, means for rotating the said drums, grooved guide-pulleys engaging the said cables opposite the drums, the guide-pulleys being mounted to turn and to slide in the direction of the length of the drums, a carrier for the said guide-pulleys to slide and rotate on, and means foradjusting the said carrier, the carrier comprising an arm mounted to swing, means for adjusting the arm and looking it in position and a rod carried by the arm, on which the pulleys are mounted to slide and turn, as set forth.

9. A machine for placing a cover on a roller, comprising a movable supporting device for the cover, cables each provided with means at one end for directly engaging one end of the cover, drums uponvwhich the'cables wind,

and. means for operating said-drums, as setv forth. p

10. A machine for placing a cover on a roller, comprising a movable supporting device for the cover, cables provided with means at one end for engaging one end of the cover, drums upon which the cables Wind, traveling guides for the said cables, and means for operating the drums, as set forth.

11. A machine for placing a cover on a roller, comprising a counterbalanced suspension device for engaging one end of the cover to support it above the roller, cables provided with clamps at one end for engaging the other I5 end of the cover at opposite sides thereof, A drums upon which the cables wind, means for guiding the cables to and from the drums to permit of-the proper winding and unwinding of the same, and means for. operating said 'dilJIIlS, as set forth;

In testimony whereof I have signed my name to this specification in the presence-0f 

